Improvement in machines for jointing staves



AfM. BENSON. Improvement in Machinesfor Joinking Staves.

Patnted March 19, 1872.

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Improvemenf in Machines for Jointing Staves. N o. 124,716, Y Patenredmarchwnm.

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AEzA M. BENsON, OE CLEVELAND, OHIO.

IMPROVEMENT IN MACHINES FOR JOINTING STA-VES.

Specification forlningpart of Letters Patent No'. 124,716, dated March 19, 1872.

Specification describing a new and Improved Machine for J ointin g Staves, inventedby ARZA M. BENSON, of Cleveland, in the county of Guyahoga and State of Ohio.

Figure 1 represents a side elevation of my improved stave-jointing machine. Fig. 2 is a plan or top view of the same. Fig. 3 is a vertical transverse section of the same on the line c c, FigLZ. Fig. 4 is a detail end view of the swinging table. Fig. 5 is a detail transverse section of the same on the line K K,Fig. 1. Fig. 6 is a detail vertical section of the sliding journal-box. Fig. 7 is a detail section of the knuckle-hinge journal-box; and Fig. Sis a detail side view of one of the gauges.

Similar letters of reference 4indicate corresponding parts.

The invention will rst be fully described, and then clearly pointedout in the claims.

A, in" the drawing, represents the frame of the machine, made of suitable' material, size, and form. B is the horizontal drivingshaft, hung in the frame and provided with apulley or other equivalent device for receiving rotary motion in the same direction from suitable mechanism. C C are the two shafts of the planing or jointing knives D D. Each shaft 'C is hung in two boxes, a and b, the box b, which is nearest the knives and in about the middle of the machine, being pivoted, by a pin or bolt, d, to the supporting-frame, while its other fasteningbolt, e, passes through a slot in b. The journal c at the back end of each shaft C is lengthwise adjustable in the frame A by meansof two horizontal set-screws, ff, between which itis held, as in Fig. 6, the fastening-bolts g passing through slots in the supporting-bar.

By this arrangement of adjustable journalboxes the axles C C can be set at a suitable f angle, more or less oblique to the direction of driving shaft B carries a toothed-wheel, t', which meshes into a pinion, j, on one of the shafts C, and into an intermediate toothed wheel, Z, which gears into a pinion, f2, on the other shaft C. By this arrangement the two shafts are driven withequal speed in opposite directions.

To the front of the frame A is pivoted the swinging table E, which carries at its ends clamps F F for holding the stave to be jointed. These clamps are pivoted near the ends of the table E, and, by a system of levers, Gr G, and a -rope or chain, m, connected with a shaft, H. When this shaft H is turned to wind up the chain m the clamps are moved to hold the ends of the stave down upon the convex beds n u that are affixed to the top of the swinging table E. The further windingup of the chains causes the table E to swing toward the knives and hold the stave in contact with the same for having the edge planed.

The shaft H is, by aloose belt, o, connected with the shaft B, when, by a treadle, I, a pulley, J, is carried against the belt o, by which it is lightened, and rotates the shaft H with the aforementioned effect. As long as the stave is being planed the pulley J must be held against the belt o, even if it should slip on B, for immediately on the release of the treadle the table E swings away from the knives and the clamps open by the action of concealed springs and drop the stave held by them. The chain m passes over rollers or sheaves p p to the shaft H, as shown.

. By a rod, g, which is lengthwise connected with the table E, are pivoted to the latter two levers, L L, which have their upper'ends bent toward the stave, and are, by vsprings r r, drawn against the same. llhey constitute feed ing-gauges for crowding the stave against the knives. Another arm, M, projecting fromthe rod g, is connected with a sliding wedge, s, which passes through the top bar of the table E. On this wedge s rests the shank t of a convex rest, N, on which the middle of the stave is supported. The rest N is so much higher than the beds a n as to give the requisite bend or bilge to the stave. Its height is regulated by the wedge s, which thus causes it to be lower the narrower the stave to be jointed.

It will be seen that the stave-clamps are adjustable lengthwiseon the main bed of the swinging table in order to fit staves of suitable length.

By shaping the cutter-'heads in the manner shown the Work .can be done much faster than on the old plan, as the projecting naked arms allow the knives to commence cutting on the stave With heavy shavings-or, in other Words, to cut away the stave as fast as it is being fed ahead, until the ends of the stave are suffi ciently cut away' to come to a bearing on the round part of the cutter head, when light shavings only will be cut.

Having thus described my invention7 I claim as new, and desire to secure by Letters Patent i Witnesses:

R. E. MIX, JOHN G. WHITE. 

